130 lines
3.9 KiB
C
130 lines
3.9 KiB
C
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/*-
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* Copyright (c) 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)var.h 5.1 (Berkeley) 3/7/91
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*/
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/*
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* Shell variables.
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*/
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/* flags */
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#define VEXPORT 01 /* variable is exported */
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#define VREADONLY 02 /* variable cannot be modified */
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#define VSTRFIXED 04 /* variable struct is staticly allocated */
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#define VTEXTFIXED 010 /* text is staticly allocated */
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#define VSTACK 020 /* text is allocated on the stack */
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#define VUNSET 040 /* the variable is not set */
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struct var {
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struct var *next; /* next entry in hash list */
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int flags; /* flags are defined above */
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char *text; /* name=value */
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};
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struct localvar {
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struct localvar *next; /* next local variable in list */
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struct var *vp; /* the variable that was made local */
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int flags; /* saved flags */
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char *text; /* saved text */
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};
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struct localvar *localvars;
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#if ATTY
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extern struct var vatty;
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#endif
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extern struct var vifs;
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extern struct var vmail;
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extern struct var vmpath;
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extern struct var vpath;
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extern struct var vps1;
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extern struct var vps2;
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extern struct var vpse;
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#if ATTY
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extern struct var vterm;
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#endif
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/*
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* The following macros access the values of the above variables.
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* They have to skip over the name. They return the null string
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* for unset variables.
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*/
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#define ifsval() (vifs.text + 4)
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#define mailval() (vmail.text + 5)
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#define mpathval() (vmpath.text + 9)
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#define pathval() (vpath.text + 5)
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#define ps1val() (vps1.text + 4)
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#define ps2val() (vps2.text + 4)
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#define pseval() (vpse.text + 4)
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#if ATTY
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#define termval() (vterm.text + 5)
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#endif
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#if ATTY
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#define attyset() ((vatty.flags & VUNSET) == 0)
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#endif
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#define mpathset() ((vmpath.flags & VUNSET) == 0)
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#ifdef __STDC__
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void initvar();
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void setvar(char *, char *, int);
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void setvareq(char *, int);
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struct strlist;
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void listsetvar(struct strlist *);
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char *lookupvar(char *);
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char *bltinlookup(char *, int);
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char **environment();
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int showvarscmd(int, char **);
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void mklocal(char *);
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void poplocalvars(void);
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#else
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void initvar();
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void setvar();
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void setvareq();
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void listsetvar();
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char *lookupvar();
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char *bltinlookup();
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char **environment();
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int showvarscmd();
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void mklocal();
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void poplocalvars();
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#endif
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